Operating mechanism for scraper-buckets.



1. R. IVICGVIFFERT. OPERATING MECHANISIVI FOR SCRAPER BUCKETS. APPLICATION FILED IAN. I7. 1914.

L23 1,275. Patented J une 26,1917.

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/A/l/EN TLG/J W/ mais s E5 irri.

'ironia n.. NusirrnnT, or DULUTH, MINNESOTA, .assi-@Non To carne' :non wenns, or

DULUTH, MINNESOTA, A.

CORPORATION or MAINE'.

OPERATING iuncnnitrsir noia scaarun-nnoxgnTs.

Specification of Letters Patent. Panam-ggg@ gum@ 269 19mg',

application sied January 1r, 1era.' serial No. eiaece.

To all lwtom it mag/concern.'

Be it known that I, JOHN R. MOGIFFERT,

a citizen of the United States, and a resident of Duluth,county of St. Louis, and State of Minnesota, have invented a new and useful llmproveinent in Operating Mechanism for Scraper-Buckets, of which the following is ated by suitable cables, one of which passes over a tower which is a necessary element of Vthe invention described in the patent reiterred to. The bucket and the operating mechanism for the saine, as shown in the patent referred to, are highly satisfactory under certain conditions but it is desired to provide Aa mechanism which will not re uire the use of a tower, which it is often di cult to provide by reason of the conditions. They buckets over a wide area and .without anyv additional mechanism such as towers and the like. To the accomplishment of these and related ends said invention then consists of the means hereinafter4 fully described and particularly pointed out in the claims.

ylhe annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such dis- 'closed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

Figure 1 is aside elevation showing the scraper bucket and connections for the same; and Fig. 2 is a similar elevation but showing more or less diagrammatically the 'various operating positions of the bucket.

In Fig. 1 there is shown a scraper bucket 1 which is open at its forward end 2 and has attached to it at the other end 3 an upwardly extending brace 4 upon which are rotatably mounted two alin'edA andsubstantially vertically disposed sheaves 5 and 6. An operatins cable 7 is attached at one end to a drum 8 and from this drum passes overtheupper sheave 5 and under the lower sheave 6. y'llhe Acable then extends through suitably xed sheaves or drums 9 and is secured at its other end to asecond operating drum 10, disposed adjacent to the drum 8 and` operated independently of the same.

The cable is permitted but limited move-l "ment through the sheaves, in the form of a ring 11 cable adjacent to the Open end 2 of the bucket, this ring being'of sumcient size to .prevent its passage over the sheaves' and 6.

there being a stop attached to such ln this way the movement of the cable over the sheaves in. one direction is limited and such movement is limited in the other direction by av short second cable, referably in the form of a chain 12, which is attachedlto thelower part of the open end 2 of the bucket and thento such ring 11 attached to the main cable.` The second cable or chain may be attached at 'various heights at the open end of the bucket, as indicated by the apertures 13, thus causing various inclinations to be given such bucket when drawn in toward the operating sheaves.

When it is desired to draw out thebucket 'to the particular spot where it is designed to digthe cable is woundin on the sheave 10, the other sheave 8 slacking away on the same, thus dragging the bucket 1 over the ground without filling the same with earth.

To operate the bucket the cable is pulled in' the opposite direction by the sheave 8 and the inclination of the Lbucket may be varied by the resistance which is put upon the cable by the other sheave l0. bucket will come 'from two sources, iirst through the cable 7 and second through the chain 12, and it will depend, ot course, upon l the resistance which is placed upon the cable as to what inclination the bucket will take. After the bucket has been filled the resistance on the cable 7 is diminished and the pull on the the chain 12, thus drawin the same over the ground on its bottom; en it is desired to bucket is then entirely through' The pull on the dump thebucket the cable is pulled in both A suitablegbrake may be applied to thel sheave 10 for the purpose of varying the rio resistance on the cable or the sheave'may be controlled in other ways to secure this result. The movement of the bucket is, of course, at all times controlled by the iniiuence of the couple operating through the two sheaves5 and 6 which is produced by the pull on the the position of these sheaves relative to the direction of movement of the bucket, or rather the .direction in which the cable is -l'ed after passing over the sheaves.

i nism is eliminated, thus ma King the device simpler and giving it a greater field for use, as in certain cases it was lnot possible or practical to construct the tower necessary in the former mechanism.

Other modes of 'applying the principle of my invention may be employed instead of the one explained, change being made asregards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent l of such stated means be employed.

I 'therefore particularly point .out and distinctly claim as my invention 1. The combination of a scraper bucket, a single continuous' cable extending in the desired line of movement of said bucket in either direction therefrom, a member mount-l ed on said bucket adjacent the rear thereof,

two elements mounted on said member in line with the direction of movementof said bucket butin different horizontal planes in the normal' position of said bucket, said cable passing freely about said two elements at the rear of said bucket and being rendered capable of tilting vertical plane upon being tautened from both ends nection between said cable and the front cable 7 in either direction and.

said bucket in a4 simultaneously, and a single conend of said bucket limitin relative movement of the two and permitting said cable to be used to haul in and out said bucket as well as tilt the same.

2. The combination of a scraper bucket, a single continuous cable extending in the desired line of movement of said bucket in either directiontherefrom, an upright member mounted at the rear of said bucket, two sheaves mounted on said member in line with the direction. of movement of said bucket but in dierent `horizontal planes in the normal osition of said bucket," said cable passing reely about said sheaves at the rear of said bucket and being rendered capable of tilting said bucket in a vertical plane upon being tautened from both ends simultaneously, and a single connection between said cable .and the 1front end of said bucket limiting relative movement of the two and permitting said cable to be used to haul in and out said bucket as well as tilt the same. y

3. The combination of a scraper bucket, a single continuous cable extending in the desired line of movement of said bucket in t either direction therefrom, an upright member mounted at the rear of said bucket, two

sheaves mounted on said member in line with the direction of' movement of said bucket but in different horizontal planes in the normal position of said bucket, said cable passing over said upper sheave and under said lower sheave and being rendered capable of tilting said bucket in a vertical plane upon being tautened from both ends simultaneously, and a single connection between said cable and the front end of said bucket limiting relative movement of the two and permitting said cable to be used to haul in and out said bucket as well as tilt the same.

Signed by me this '6th day of January,

JOHN R. MGGIFFERT. Attested b J. J. JUMM, A. H. SoHRAss. 

